10856861 has 2 divisors, whose sum is σ = 10856862. Its totient is φ = 10856860.

The previous prime is 10856831. The next prime is 10856869. The reversal of 10856861 is 16865801.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10824100 + 32761 = 3290^2 + 181^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10856861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10856869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5428430 + 5428431.

It is an arithmetic number, because the mean of its divisors is an integer number (5428431).

Almost surely, 2^10856861 is an apocalyptic number.

It is an amenable number.

10856861 is a deficient number, since it is larger than the sum of its proper divisors (1).

10856861 is an equidigital number, since it uses as much as digits as its factorization.

10856861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 10856861 is about 3294.9751137148. The cubic root of 10856861 is about 221.4291328067.

The spelling of 10856861 in words is "ten million, eight hundred fifty-six thousand, eight hundred sixty-one".